The Håga Mound (Hågahögen) or King Björn's Mound is one of the most magnificent remains from the Nordic Bronze Age. Håga mound is approximately 7 metres high and 45 metres across and it was constructed ca 1000 B.C. by the shore of a narrow inlet of the sea (the land has been continually rising since the Ice Age). It was constructed of turfs that had been laid on top of a cairn which was built on top of a wooden chamber containing a hollow oak coffin with the cremated remains of a short man. During the burial there had probably been human sacrifice, the evidence for which is human bones from which the marrow had been removed.
The coffin contained rich unburnt bronze objects such as a Bronze age sword, a razor, two brooches, a number of thickly gilded buttons, two pincers and various other bronze objects. They may all come from the same workshop in Zealand. The mound was excavated 1902-1903 by Oscar Almgren together with the future king Gustaf VI Adolf. Only minor excavations have been done in the Bronze Age settlement but the area contains several house foundations in stone. The findings from Hågahögen were stored in The Swedish Museum of National Antiquities.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.